Supporting JsonPointer?

[inder123]

https://tools.ietf.org/html/rfc6901

Any thoughts on support JsonPointer for self-referencing values in a JSON doc? JSR-367 is planning to support it.

[swankjesse]

We've got JsonPath and this is isomorphic. I have no preference but we should pick the winner!

[ghostbuster91]

I've just tried to create a naive implementation of JsonPath in moshi using annotations but I think it is not possible right now. Just after I add an attribute to my annotation moshi stops matching the adapter.

In casy anybody would be interested in pushing this further, here is my code:

class JsonPathFactory : JsonAdapter.Factory {
    override fun create(type: Type?, annotations: MutableSet<out Annotation>, moshi: Moshi): JsonAdapter<*>? {
        val jsonPathAnnotation = annotations.firstOrNull { it.annotationClass == JsonPath::class }
        if (jsonPathAnnotation != null) {
            val path = Proxy.getInvocationHandler(jsonPathAnnotation).invoke(jsonPathAnnotation, JsonPath::class.java.declaredMethods.first { it.name == "path" }, arrayOf()) as String
            return object : JsonAdapter<String>() {
                
                @JsonPath()
                override fun fromJson(reader: JsonReader): String? {
                        @Suppress("UNCHECKED_CAST")
                        val map = reader.readJsonValue() as Map<String, Any>
                        var currentNode = map
                        val pathSegments = path.split("/")
                        pathSegments.dropLast(1).forEach {
                            @Suppress("UNCHECKED_CAST")
                            currentNode = currentNode[it] as Map<String, Any>
                        }
                        return currentNode[pathSegments.last()] as String
                }

                override fun toJson(writer: JsonWriter?, @JsonPath value: String?) = Unit
            }
        }
        return null
    }
}


@Retention(AnnotationRetention.RUNTIME)
@JsonQualifier
annotation class JsonPath(val path: String = "")

[DanielNogueiraAndroid]

Hey, any progress on the implementation of the JsonPointer?

[JakeWharton]

No one is working on this currently.

…

On Mon, Aug 19, 2019 at 9:51 AM Daniel Nogueira ***@***.***> wrote: Hey, any progress on the implementation of the JsonPointer? — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#69?email_source=notifications&email_token=AAAQIEMQXX6DUNHDDFPB2O3QFKQPVA5CNFSM4BNAD2Y2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD4TAHSI#issuecomment-522585033>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAAQIEKTLWCOX2QECRZSYADQFKQPVANCNFSM4BNAD2YQ> .